could you give me. examples of definition in lexicology

Lexicology (from Gr lexis ‘word’ and logos ‘learning’) is the part of linguistics dealing with the vocabulary of the language and the properties of words as the main units of language. The term v o c a b u l a-r y is used to denote the system formed by the sum total of all the words and word equivalents that the language possesses. The term word denotes the basic unit of a given language resulting from the association of a par-ticular meaning with a particular group of sounds capable of a particular grammatical employment. A word therefore is simultaneously a semantic, grammatical and phonological unit.
Thus, in the word boy the group of sounds [bOI] is associated with the meaning ‘a male child up to the age of 17 or 18’ (also with some other meanings, but this is the most frequent) and with a definite grammatical em-ployment, i.e. it is a noun and thus has a plural form — boys, it is a per-sonal noun and has the Genitive form boy’s (e. g. the boy’s mother), it may be used in certain syntactic functions.

Definition of LEXICOLOGY
: a branch of linguistics concerned with the signification and application of words
— lex·i·co·log·i·cal \-kō-ˈlä-ji-kəl, -kə-ˈlä-\ adjective
— lex·i·col·o·gist \-jist\ noun